Chapter
Apr 26, 2012
Evaluation of Dredged Material Disposal Options Using Chemical and Biological Testing Data and Risk Based Indices
Authors: Lisa Lefkovitz, Dave Tomey, and Jean BrochiAuthor Affiliations
Publication: Dredging '02: Key Technologies for Global Prosperity
Abstract
This paper provides an overview of the Green Book testing regime, focusing on evaluation of risk and compares the results of synoptic testing of sediments from three harbors in the Northeast. First, sediment chemical concentrations from the three locations are compared to established sediment quality guidelines (SQGs). Next, biological effects tests, including the 10-day toxicity tests using Ampelisca abdita and Americamysis bahia are conducted to determine the potential for "adverse effects." Finally, 28-day bioaccumulation tests using Macoma nasuta and Nereis virens are used to assess contaminant mobility. Alone, these tests only assess exposure and not the potential for adverse effects-from COCs to higher trophic levels. For this reason, a risk-based approach is also used to evaluate the potential for ecological and human impacts from exposure to contaminated sediments. Risk-based evaluations, performed on bioaccumulation data from the 28-day tests, were conducted and the results are evaluated in the context of the standard evaluations for suitability of dredged material disposal in open waters. This "risk-based" approach to evaluate disposal options allows an effective management strategy, which minimizes environmental effects.
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© 2003 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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Lisa Lefkovitz
Research Scientist, Battelle, 397 Washington Street, Duxbury, MA 02232
Dave Tomey
Biologist, US EPA - New England, One Congress Street, Boston, MA 02114
Jean Brochi
Biologist, US EPA - New England, One Congress Street, Boston, MA 02114
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